Medium
Backstage: Improper access control in backend action invocation
Type: advisorySources: OSV
Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. This issue is fixed in version 0.17.8.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-106495
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 03:36 UTC · Revision 1
Source evidence
Backstage: Improper access control in backend action invocation
core-osv · Original sourcePublished 12 Oct 2026, 20:11 UTC
Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. This issue is fixed in version 0.17.8.
osv:CVE-2026-106495
Complete source record
{
"id": "9ab61ce587f99c6a816bce6481b87ff895a34d77aeaa154259dcfe5673cb1ccc",
"url": "https://osv.dev/vulnerability/CVE-2026-106495",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Backstage: Improper access control in backend action invocation",
"summary": "Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. This issue is fixed in version 0.17.8.",
"evidence": "osv:CVE-2026-106495",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-106495",
"aliases": [
"CVE-2026-106495",
"GHSA-3xr5-8w6c-p5gw"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/backstage/backstage",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "0e67bc1fc88fba3a8cb716d3584cef05ecbcf9a8"
},
{
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}
],
"database_specific": {
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{
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{
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}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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{
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"source": "REFERENCES_COMMIT"
},
{
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"source": "REFERENCES_TAG",
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],
"modified": "2026-10-28T02:30:32.718372576Z",
"provider": "osv",
"references": [
"https://github.com/backstage/backstage/releases/tag/v1.54.6",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106495.json",
"https://github.com/backstage/backstage/security/advisories/GHSA-3xr5-8w6c-p5gw",
"https://nvd.nist.gov/vuln/detail/CVE-2026-106495",
"https://github.com/backstage/backstage/commit/a8fb34a990a69bcb745e85a3213cf9e5ba2d31a3"
],
"provider_metadata": {
"cwe_ids": [
"CWE-284"
],
"cna_assigner": "GitHub_M",
"unresolved_ranges": [
{
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{
"range": [
{
"fixed": "0.17.8"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106495.json"
}
},
"related_cves": [
{
"value": "CVE-2026-106495",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 500060,
"published_at": "2026-10-12T20:11:07.68+00:00"
}